2913781020 has 48 divisors (see below), whose sum is σ = 8161661088. Its totient is φ = 776715520.

The previous prime is 2913781019. The next prime is 2913781037. The reversal of 2913781020 is 201873192.

2913781020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185722 + ... + 200798.

It is an arithmetic number, because the mean of its divisors is an integer number (170034606).

Almost surely, 2^2913781020 is an apocalyptic number.

2913781020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2913781020 is an abundant number, since it is smaller than the sum of its proper divisors (5247880068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2913781020 is a wasteful number, since it uses less digits than its factorization.

2913781020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18310 (or 18308 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2913781020 is about 53979.4499786724. The cubic root of 2913781020 is about 1428.2984668286.

The spelling of 2913781020 in words is "two billion, nine hundred thirteen million, seven hundred eighty-one thousand, twenty".